采用具有易加工、柔软、韧性好等特点的聚偏二氟乙烯(PVDF)压电薄膜传感器作为足底压力测量系统采集元件,详细介绍了系统的硬件设计,主要包括数据采集和数据通信两部分.数据采集部分包括电荷放大电路、滤波电路、后级调整输出电路;数据通信部分包括ATmega16单片机最小系统、无线数传模块、串口通信电路.实验结果表明:数据符合足底压力实际分布,达到了预期的设计要求.%The polyvinylidene fluoride(PVDF)piezoelectric film sensor with easy processing,soft,good toughness and other specialties is used as acquisition component of plantar pressure measurement system.Hardware design of the system is introduced in details. The hardware design mainly includes two parts:data acquisition and data communication.data collection part mainly consists of a charge amplifier circuit,a filtering circuit,a circuit for adjusting output;data communication part mainly consists of ATmega16 micro controller unit(MCU)minimum system,wireless data transmission module,serial communications circuit. The experiment of plantar pressure distribution is implemented with the developed system.Through analysis on experimental data,it shows that the results is in accord with the actual condition of the plantar pressure distribution which achieves the expected design requirements.
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